JPH01313036A - Light discoloration resistant mat for wiping shoe - Google Patents

Abstract

PURPOSE:To hold excellent fastness to washing and improve light discoloration resistance (yellow discoloration resistance) by dyeing pile yarn which is tufted to base cloth with an acid dye or a metal containing dye while forming same with polyhexamethylene adipamide fiber treated by a small quantity of natural or synthetic fixing agent. CONSTITUTION:A mat consists of a base cloth 1, mat pile yarn 2 which is tufted to the base cloth, and elastomer packing 3 attached to the other side of the pile face of the base cloth 1. The mat pile yarn 2 is dyed with an acid dye or a metal containing dye and formed with a polyhexamethylene adipamide fiber (nylon 66) treated by a small quantity of natural or synthetic fixing agent. The nylon 66 fiber is used in the form of multifilament yarn, being particularly desirable to be modified cross-section curled multifilament yarn, and having 10-50% cristallinity, desirably 20-40% cristallinity by density method. On the other hand, a condensation of phenol sulfonic acid and formaldehyde is used as the synthetic fixing agent.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a light-resistant discoloration drying mat, and in particular, to a shoe-wiping mat for rental, which has a light-fastness and discoloration property while maintaining excellent washing fastness and waxiness. Regarding a shoe-wiping mat that has significantly improved

(Prior art) Recently, rental shoe cleaning mats, so-called rental mats, have become very popular mainly at the entrances of stores and offices. In a rental system in which the paddles are collected, recycled, and put back into use, maintaining stable quality of the mats used is a very important issue. Rental mats are very often used near the entrances and exits of stores and offices due to their dust control function and entrance accent.
Not only is the pile exposed to sunlight, but it is also exposed to dirt and rainwater, and when washed after collection, it is washed with a strong alkali to thoroughly remove stubborn dirt, which reduces the wear resistance of the pile. It is necessary to give sufficient consideration to factors such as color fastness and dyeing fastness.

Natural fibers such as cotton, vinylon, nylon, polyester, and acrylic, as well as various synthetic fibers, have been used as the pile material for rental mats. nylon fibers have been used in relatively large numbers, and this trend is expected to continue in the future.

(Problems to be solved by the invention) Nylon pile rental mats currently in practical use are made of polycabramide (nylon 6) fibers, and these mats are also susceptible to exposure to direct sunlight, dirt, and rainwater. After collection, the nylon pile is washed with a very strong alkali to thoroughly remove stubborn dirt. Currently, dyes are selected mainly from strong acidic dyes and alloy dyes, and these are treated with natural tannins and various synthetic fixing agents. However, the combination of these acid dyes and alloy dyes with various natural and synthetic fixing agents is considered to be of excessive quality in general use, but it is not suitable for rental mats used for the above-mentioned purposes. This is by no means excessive; on the contrary, in many cases, the color fades before the pile wears out, resulting in substandard products.Also, for dyed nylon products, natural or synthetic fixing agents are used to maintain the dye fastness mentioned above. However, this fixing agent tends to yellow due to sunlight or alkali, and with nylon 6, this yellowing is very noticeable in light colors such as beige and achromatic colors such as gray. It becomes an unsightly condition. This varies depending on the amount of the fixing agent, but normally 5 to 15% of the fixing agent is required for the above purpose, and if it is less than this, the degree of yellowing will be lower, but the fixing effect will also be reduced. There is a tendency.

Therefore, an object of the present invention is to provide a shoe-wiping mat that eliminates the above-mentioned drawbacks of conventional nylon mats, maintains excellent washability, and has significantly improved resistance to light discoloration (yellowing resistance). It is in.

(Means for Solving the Problems) According to the present invention, a shoe comprises a base fabric, a pile yarn tufted to the base fabric, and an elastomer backing layer applied to the pile yarn stitching surface of the base fabric. Shoes with excellent light discoloration resistance, characterized in that the wipe mat is made of polyhexamethylene adipamide fibers whose pile threads are dyed with an acid dye or a metal-containing dye and treated with a small amount of a natural or synthetic fixing agent. A wiping mat is provided.

(Function) The present invention uses polyhexamethylene adipamide (nylon 6
．． 6) Among the various nylon fibers, the fiber can be dyed with satisfactory washability and lowness with the least amount of fixing agent, and therefore, by reducing the amount of fixing agent used, light discoloration resistance (resistance to light discoloration) can be improved. This is based on the knowledge that yellowing (yellowing) can also be significantly improved.

In general, the solubility index (Solubility Parameter
Er.

This solubility index is POIYIer).
Landbook” Chapter 4 (John Wley &
Published by 5ons, Inc.

(1967), it is defined as the 1/2 power value of the cohesive energy density (Cal/cc).

The solubility index of commercially available nylons is shown in Table 1 below.

Table 1 Types of polyamides 1L Polylaurinlactam (Nylon 12) 9.5 Polyundecaneamide (Nylon 115 9.9 Polycabramide (Nylon 6) 12.7 According to the results in Table 1 above, nylon 6.6 has various This shows that the strength of the hydrogen bonds in the resin is the strongest among the nylons.Due to the strength of the hydrogen bonds, nylon 6.6 is the most difficult to dye; This means that the dye is difficult to separate once it enters, that is, it has a high washing hardness and waxiness.

In the present invention, taking advantage of this characteristic of nylon 6.6, we dye nylon 6.6 fibers with acidic dyes or metal-containing dyes, and fix them with a small amount of natural or synthetic fixing agents, thereby achieving excellent properties. While maintaining the washing hardness low degree,
It improves the photochromic properties caused by fixing agents, and is particularly effective in improving the durability of shoe cleaning mats dyed in light colors such as beige and achromatic colors such as gray.

(Preferred Embodiment of the Invention) In FIG. 1 showing the cross-sectional structure of the shoe cleaning mat of the present invention (hereinafter sometimes simply referred to as a mat), this mat includes a base fabric 1, mat pile yarn tufted to this base fabric. 2, and an elastomer backing 3 applied to the opposite side of the pile surface of the base fabric 1.
is a polyhexamethylene adipamide dyed with an acid dye or a metallized dye and treated with a small amount of a natural or synthetic Fick agent, as detailed below. (nylon 6
．． 6).

Nylon 6.6 fibers are generally used in the form of multifilament yarns, particularly preferably irregular cross-section crimped multifilament yarns, the single fiber diameter of the filaments generally being in the range 10 to 200 μm, especially 20 to 100 μm. This is preferable from the viewpoint of pile fluff, dust collection ability, and texture, and if it is thinner than the above range,
The pile tends to lie flat, and the dust collection properties tend to be worse than those within the above range. Further, if the thickness is greater than the above range, the texture tends to be poor, and the dust retention property tends to be lower than when it is within the above range.

The cross-sectional shape of the filament may be circular, but from the viewpoint of texture, stain resistance, and dust collection/retention properties, it is preferable to use yarn with an irregular cross-section. In particular, the following formula SL is the cross-sectional area of the filament, and So is the area of the circumscribed circle with respect to the cross section of the filament, and the irregular cross-sectional area ratio (RS) defined by is 10 to 200%
, especially preferably within the range of 10 to 60%,
That is, when the Rs value is larger than the above range, the deep color impression is lost, and the texture, dust-trapping properties, and appearance characteristics after dust adhesion tend to deteriorate. On the other hand, when the R8 value is smaller than the above range, abrasion resistance, fiber strength, etc. tend to be lower than those within the above range.

The shape of the irregular cross-section yarn is preferably three-lobed, but is not limited to this, and may be, for example, double-lobed, four-lobed, triangular, square, etc., and can be extruded through a spinneret of a corresponding shape. A yarn with an irregular cross section is obtained. Means for imparting latent crimpability to a nylon filament are also known per se. For example, a filament made by coaxially extruding two types of polymers with different hot water shrinkability, and a method in which the two types of polymers are side-piped and The filament is laminated side by side, the side of the filament is given an external shape, and the filament is crimped and then heat set under tension at a temperature lower than the processing temperature.

The crimpable multifilament is generally 5o.

It is used for tufting the base fabric in the form of multifilament yarns of denier to 5000, especially denier 1000 to 4000. This multifilament yarn may be a single yarn or a plied and twisted yarn, but generally a plied and twisted yarn made by twisting two to four single yarns together is preferred. That is, when such a plied yarn is used, the cut surface of the matte pile is visible, the side surface of the pile yarn is visible, and a marbled appearance can be obtained.There is no particular limit to the number of twists of the zero plied yarn, but Generally from the bottom.

〜3002(S), Upper side 80〜25OS(Z)
is preferred.

The nylon 6.6 fiber used in the present invention was determined by the density method and
It is desirable to have a crystallinity of 0 to 50%, especially 20 to 40%. Since dye staining occurs in the amorphous region, if the degree of crystallinity is greater than the above range, it tends to be difficult to dye to a satisfactory density, while if it is less than the above range, the pile Mechanical properties become inferior.

Dyeing with acidic dyes is performed by methods known per se such as neutral dyeing, weak acid dyeing, and strong acid dyeing. To adjust the pH, acetic acid, formic acid, sulfuric acid, etc. are used, and for the purpose of leveling, leveling agents such as sulfur salt and ammonium sulfate can also be used.

As an acid dye, C,1, acid yellow 118°C0! , Acid Orange 19°C, 1, Acid Red 85°C, 1, Acid Violet 48°C, 1, Acid Blue 8°C, 1, Acid Green 40°C, 1, Acid Brown 294゜C0! , acid black 48°, etc. can be used.

On the other hand, the metal complex dyes used in the present invention include 1:1 type and 1:2 type.
- Dioxyazo acid dyes are used. In dyeing with this metal complex dye, a larger amount of acid is used than with ordinary acid dyes, or a combination of acid and a nonionic surfactant is used in the dyeing operation.

In the present invention, among the various dyes for dyeing nylon, acid dyes and metal-containing complex dyes are used because the resulting dyed products have a higher washability and waxiness than dyed products using other dyes. In particular, metal-containing dyes are the most excellent in terms of light resistance and washing wall waxiness.

When dyeing, nylon 6.6 fibers are treated in advance at a temperature of about 40 to 60°C in an aqueous bath containing acids and leveling agents, a predetermined amount of dye is added to this bath, and the temperature is raised to boiling temperature. Heat and dye. If the nylon 6.6 fiber used has crimpability, crimp will occur during dyeing, so it is desirable that the dyeing operation and fixing operation be performed on tufted pile yarns.

After the color washing treatment, a fixing treatment is performed to further improve the waxiness of the washing wall. According to the present invention, the amount of fixing agent used in this process is significantly smaller than that of conventional nylon mats, thereby The degree of yellowing caused by the fixing agent can be significantly reduced.

As a natural fixing agent, tannin is used, for example, it is treated in an acidic solution containing 0.1 to 10%, especially 0.5 to 5%, at a temperature of 50 to 90°C, and then treated with tartar. Treatment is carried out at 0.05 to 5%.

On the other hand, as a synthetic fixing agent, a condensate of phenolsulfonic acid and formaldehyde is used, and examples of the phenolsulfonic acid include p-hydroxybenzenesulfonic acid and 4,4'-hydroxy-3-sulfoxydiphenylsulfone. It will be done. Processing conditions can be based on natural conditions.

As the base material for tufting the multifilament yarn, any material such as nonwoven fabric, woven fabric, knitted fabric, etc. can be used. Non-woven fabrics used include stable or filament fabrics such as polyester 1aia and polyamide fibers, which are integrated into a thin sheet using adhesives, embossing, etc.; A small-scale fabric, such as a gauze, a silk fabric, or a net-like fabric with a small knitting density is preferably used. The number of stitches to be applied to the base material is preferably 1/4 to 1/10 in gauge, and 5 stitches/11n.
ch to 15th tree 711nch is good.

All elastomer backings conventionally used for this type of mat can be used, such as SBR%NBR,
Rubbers such as chloroprene rubber, soft vinyl chloride resin,
Thermoplastic elastomers such as urethane elastomers and styrene-butadiene block polymer elastomers are used. These backings can be manufactured by applying the above-mentioned elastomer latex and drying or curing it, or by overlapping the unvulcanized sheet of the rubber and the stitched surface of the mat, followed by thermal bonding and vulcanization or curing. It can also be produced by crosslinking. The thickness of the elastomer backing is generally 0. It is preferably in the range of 0.1 to 3+am, particularly 0.1 to 2.5 mm. That is, the thickness is 0.
Relatively thin ones, 51101 or less, can be used in combination with a 'mat base, while thicker ones, 0.5 ma+ or more, can be used alone as integrated mats.

The ends of the mat pile formed by tufting are trimmed and crimped if necessary.

In the present invention, it is desirable that the pile length after crimping is generally in the range of 3 to 30 mm, particularly 5 to 20 mm.

(Effects of the Invention) According to the present invention, nylon 6.6 fibers are selected as pile threads for shoe cleaning mats, dyed with acid dyes or metal-containing dyes, and treated with a small amount of fixing agent. Rental shoe cleaning mats in light to achromatic colors that prevent yellowing caused by fixing agents while maintaining light fastness and washing fastness that can withstand harsh use and harsh washing as mats. It has become possible to significantly extend the number of cycles.

The present invention relates to a method that can achieve both yellowing and fixing effects even when a fixing process is applied to light or achromatic colors.
It has become clear that both can be achieved by using .

(Example) This will be explained below using examples.

Example 1 A mat consisting of the following structure was manufactured.

Pile: BCF nylon (nylon 6) 1300 denier, 2 twists, first twist 150 times/m, first twist 150 times/m
m Heat set base Fabric: Polyester plain woven fabric (200g/m') Tuft standard Gauge 5/32, 8 stitches/inch, pile height 10mm (cut pile) This matte original fabric before backing is dyed gray using a Wins dyeing machine. After dyeing to gray using an acid dye of
% treated at each level and one not treated with the fixing agent were prepared, and NBR latex (46% solid content) was applied to these mats at 1000 g/m 2 and dried and cured to produce each mat.

Next, use nylon 6.6 for the pile and follow the same procedure.
The same organization produced mats in the same color.

The above nylon 6 and nylon 6.6 mats were washed and dried 20 times separately in an industrial washing machine (23g load) to check for discoloration and staining of white cloth. (This test is performed when rental mats are rented repeatedly.
As mentioned above, when nylon pile mats are washed in large quantities in industrial washing machines, the fading and staining properties due to washing are nylon 6.6. showed considerably superior results compared to nylon 6. This shows that even after repeated use and washing, nylon 6.6 is less likely to fade, and cross-contamination is much less likely to occur even when items of different colors are mixed and washed. This increases the number of times the mat is used, leading to resource savings and the provision of inexpensive products.

Example 2 A test was conducted in which the mat used in Example 1 was left outdoors for two weeks and exposed to sunlight. The results were as follows.

As mentioned above, when a product treated with a fixing agent is exposed to sunlight, it tends to yellow, which is proportional to the amount of fixing agent treated. If the degree of yellowing is lower than grade 3, it becomes very unsightly, and in this respect, nylon 6.6 is also superior. (This is thought to be due to the difference in the adsorption rate of the fixing agent.) As mentioned above, from Example 1.2, when using nylon pile mat, when nylon 6.6 is used, it has less fading and staining properties than nylon 6. It became clear that very good results were obtained in all aspects including yellowing.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the shoe cleaning mat. Patent Applicant: Duskin Co., Ltd. Figure 1 Procedures Manual (Elephant) July 25, 1988 Director General of the Patent Office Yoshi 1) Takeshi Moon 1 Indication of the Case Patent Application No. 144769 of 1988 2, Invention Name: Lightfast discoloration dry wipe mat 3, Person making the amendment Relationship to the case Patent applicant address: 1-6-24 Nakatsu, Oyodo-ku, Osaka Name: Duskin Co., Ltd. 4, Agent: 105-5, Date of amendment order: 7, Amendment Contents (1) At the bottom of page 3, line 63, and on page 4, line 2, the words "metal-containing dye" are corrected to "metal-containing dye 1." (2) From page 12 In lines 4 and 7. "Metal complex dye" should be corrected to "metal-containing dye j." (3) In line 12, page 12. "Metal complex dye" should be corrected as "metal-containing dye j." , ``Corrected as metal-containing dye 1. (4) On the last line of all pages 19. Corrected the text ``R and U'' to read ``Same as 9J.''

Claims (4)

[Claims] (1) In a shoe cleaning mat consisting of a base fabric, pile yarn tufted to the base fabric, and an elastomer backing layer applied to the pile yarn stitching surface of the base fabric, the pile yarn is dyed with an acid dye or a metal-containing dye. A shoe cleaning mat with excellent light resistance and discoloration, characterized by being made of polyhexamethylene adipamide fibers dyed with polyhexamethylene adipamide fibers and treated with a small amount of a natural or synthetic fixing agent. (2) The shoe cleaning mat according to item 1, wherein the fixing agent is a condensation resin of phenolsulfonic acid and formaldehyde. (3) Fixing agent is 0.1 to 10 per pile fiber
A mat according to clause 1, present in an amount of % by weight. (4) Polyhexamethylene adipamide fiber was determined by density method to 1
2. The mat according to claim 1, which has a crystallinity of 0 to 50% by weight.